Finding the Fourth Proportional to 42.33, 58.42 and 30.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42.33 : 58.42 = 30.67 : x
2. Step 2: Convert to fraction form
   42.33/58.42 = 30.67/x
3. Step 3: Cross multiply
   42.33x = 58.42 × 30.67
4. Step 4: Simplify right side
   42.33x = 1,791.69
5. Step 5: Solve for x
   x = 1,791.69/42.33
6. Step 6: Final answer
   x = 42.33